-v :- quotacheck reports its operation as it progresses.
-g :- Only group quotas listed in /etc/mtab or on the filesystems specified are to be checked
-u :- Only user quotas listed in /etc/mtab or on the filesystems specified are to be checked. This is the default action
-m :- Don’t try to remount filesystem read-only
-a :- Check all mounted non-NFS filesystems in /etc/mtab